def addTrackwayToLayer(self, layer, tracks):
""" Populates the specified display layer with the track nodes
corresponding to the specified tracks. """
nodes = list()
for track in tracks:
trackNode = self.getTrackNode(track)
if trackNode:
nodes.append(trackNode)
if len(nodes) == 0:
return
# now add those nodes to the layer
cmds.editDisplayLayerMembers(layer, nodes, noRecurse=True)
def addPath(self, tracks, degree =1):
""" Creates a list of the (x, z) track coordinates in a scene from a
given track series. The hidden tracks are not included, nor are
tracks that are still at the origin. The path is specified as a list
of 3D points, with the y coordinate zeroed out."""
path = list()
for track in tracks:
if not track.hidden and track.x != 0.0 and track.z != 0.0:
path.append((track.x, 0.0, track.z))
curve = cmds.curve(point=path, degree=degree)
layer = self.PATH_LAYER
self.createLayer(layer)
cmds.editDisplayLayerMembers(layer, curve, noRecurse=True)
def deleteAllPaths(self):
""" Deletes all curves that have been placed in the PATH_LAYER. """
curves = cmds.editDisplayLayerMembers(
self.PATH_LAYER, query=True, noRecurse=True)
for curve in curves:
cmds.delete(curve)
cmds.delete(self.PATH_LAYER)
def selectAllTracks(self):
""" All tracks are selected, by accumulating a list of all track nodes
in the trackway layers. """
layers = cmds.ls( type='displayLayer')
nodes = list()
for layer in layers:
if layer.endswith(self.LAYER_SUFFIX):
nodes.extend(cmds.editDisplayLayerMembers(
layer, query=True, noRecurse=True))
cmds.select(nodes)
def selectTracksInLayer(self, layer):
""" A fast way to select the track nodes within a given layer. """
nodes = cmds.editDisplayLayerMembers(layer, query=True, noRecurse=True)
cmds.select(nodes)